Facile synthesis of Zn 2 V 2 O 7 /RGO nanocomposite for enhancing the electrochemical performance and evaluating the supercapacitor device

Pyrochlore-structured zinc vanadium oxide with RGO (Zn 2 V 2 O 7 /RGO) composite was synthesized using the simple hydrothermal process for energy storage device fabrication. The structural, vibration spectrum, surface morphology, and elemental of the Zn 2 V 2 O 7 /RGO composite were analyzed using different analytical methods. Then, the electrochemical performance was examined using Zn 2 V 2 O 7 /RGO composite modified electrode with 3electrode and 2 -electrode setup by cyclic voltammetry (CV), galvanostatic charge - discharge (GCD), and electrochemical impedance spectrum (EIS) techniques. Consequently, the Zn 2 V 2 O 7 /RGO composite revealed notable pseudo -capacitive behavior which has been confirmed through CV analysis. The nano size -based Zn 2 V 2 O 7 /RGO composite electrode material obtained notable specific capacitance (Csp) of 1400.51F/g owing to the synergistic promotion of Zinc and vanadium oxides. Furthermore, the ASC device of Zn 2 V 2 O 7 /RGO ||RGO displayed the efficient power density of 1371 kW/kg at the energy density of 8Wh/kg and the device has enhanced cycling performance with 72.8 % capacitance.